bitstream or linear pcm?

skywalker738

Novice Member
sorry for asking what is probably an obvious question to many on here but...i have my ps3 connected to my denon amp via optical cable, should the output be set to bitstreat or linear? i think its currently bitstream.

thanks guys.
 

Tony_T

Active Member
Not entirely......

Bitstream will enable you to hear the 'standard' DD or DTS tracks via Blu Ray. You may be able to use linear PCM if your amp can decode the uncompressed PCM format.

I tried it and my amp defaulted to Dolby PLII, so I guess my amp doesn't do it...
 

RAINS

Active Member
On another note if your amp accepts both then which is best ??

My amp show's PCM 48:smashin:
 

Tony_T

Active Member
In theory the PCM format should be better providing of course it is a multichannel signal you've got.

You don't you compare and let us know your decision?

BTW which amp is it?
 

hottstuff

Banned
Use bitstream for ordinary dvd , and PCM for Bluray , if it has pcm of course.
No advantage to using pcm on ordinary dvd with DD/DTS/stereo
 

markmitt

Active Member
Not entirely......

Bitstream will enable you to hear the 'standard' DD or DTS tracks via Blu Ray. You may be able to use linear PCM if your amp can decode the uncompressed PCM format.

I tried it and my amp defaulted to Dolby PLII, so I guess my amp doesn't do it...

Only will get 2 channel PCM via optical though...
 

markmitt

Active Member
Not entirely......

Bitstream will enable you to hear the 'standard' DD or DTS tracks via Blu Ray. You may be able to use linear PCM if your amp can decode the uncompressed PCM format.

I tried it and my amp defaulted to Dolby PLII, so I guess my amp doesn't do it...

Bugger, I have just seen what receiver you have in your sig, and I was looking to buy that one too, as I assumed due to its specs, it would give uncompressed to 7.1. I guess the HDMI function on it is just for switching purposes rather than full throughput then...:(
 

stevos

Distinguished Member
Bitstream will produce the best sound, but very few if any amps currently support the hd audio files via bitstream. Therefore if your amp supports 5.1 lpcm then use that method.

Basically if you use lpcm the ps3 is dividing the bitstream (the original source as it is stored on the disc) into 5 channels and then decoding the dd (or dts) track and encoding it as 5 lpcm.

I don't believe (although i could be wrong) that optical has the bandwidth to carry a 5 channel lpcm score. Either way the studios don't allow it to be sent over optical and therefore the only way to get a amp to reconise it is via hdmi.

I hope this helps
Steve.
 

abs

Well-known Member
i've been testing the sound through my sony 7100es and ps3 via hdmi for uncompressed 5.1 pcm sound and switching between optical bitstream. imho i found the sound via optical more punchier and dynamic . does anyone think the same?
 

stevos

Distinguished Member
p.s. bitstream as the name suggest is a bit perfect pass of the original soundtrack as stored on the media. Any other method of passing data requires the audio to be initially decoded from the mpeg original and then recoded into something else, i.e. lpcm.

If you amp can't decode the bitstream then it needs decoding anyway.
 

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